 There can be some changes in the universe that happen regularly at a certain time such as such as a change of seasons or Night and day some changes happen like this But there are some changes which do not have any fixed time and can happen any time such as such as rain a Storm an earthquake or or a flood they can occur at any point in time, right? These type of changes are called irregular changes and there can be many more examples of these kind of changes So regular changes are those which happen regularly at certain times and Irregular those which can happen at any point in time and you can try and relate it to to your activities as well You wake up every day, right? That's a regular change But you might be doing different things in a day You might not do you might not repeat your activity the next day For instance, you might play cricket on day one and you might just draw draw things on day two So your activities might change. That's an irregular change. It's not repeated over a certain period of time Why to do think of some more examples now?